- All groups: Treatment repeats every 3 weeks for 4 doses in the absence of disease progression or unacceptable toxicity. Patients with complete response after 4 doses receive a maximum of 2 additional doses. Patients with stable disease or minor, mixed, or partial response after 4 doses receive a maximum of 12 additional doses. Patients with no response after 4 doses receive immunization with the same peptides and interleukin-2 IV over 15 minutes every 8 hours for a maximum of 12 doses beginning 1 day after each immunization.